Arithmetic and control unit



FIG. 1 is a front elevational view of an arithmetic and control unit showing our new design;

FIG. 2 is a rear elevational view thereof;

FIG. 3 is a left side elevational view thereof;

FIG. 4 is a right side elevational view thereof;

FIG. 5 is a top plan view thereof;

FIG. 6 is a bottom plan view thereof;

FIG. 7 is a front left top perspective view thereof in an upright position;

FIG. 8 is a front right bottom perspective view thereof in the upright position; and,

FIG. 9 is a front left top perspective view thereof.

The broken line portions showing in the drawings are for illustrative purpose only and form no part of the claimed design. 

The ornamental design for an arithmetic and control unit, as shown and described. 